BLOG

There are four types of industrial automation motor loads:

Variable horsepower and constant torque

Variable torque and constant horsepower

Variable horsepower and variable torque

Positional control or torque control.

Variable horsepower and constant torque applications include conveyors, cranes, and gear-type pumps. In these applications, the torque is constant because the load doesn't change.

The required horsepower may vary depending on the application, which makes constant speed ac and high speed high torque bldc motor a good choice.

An example of a variable torque and constant horsepower application is a machine rewinding paper. The material speed remains constant, which means the horsepower doesn't change. The load does change.

In small systems, this is a good application for dc motors or a servo motor. Regenerative power also is a concern and should be considered when sizing the linear step motor or choosing the energy control method.

Stepper motor with encoder, closed-loop control, and full quadrant drives may be beneficial for larger systems.